Read this to the class:
At recess, Sam kicked a ball across the blacktop and it rolled all the way to the fence. Later, Sam kicked it just as hard across the grass, and it stopped after a few steps. Sam's friend said, "The ball just got tired." Sam isn't sure that balls get tired. Your team's job: find out what makes a rolling ball stop.
Teams of three, with three jobs that rotate after every surface: Roller (lets the ball go), Marker (marks where it stops), Recorder (measures and writes the number).
In the full lesson PDF
- Bet (5–10 min)
- Hunt (20 min)
- Reveal (10–15 min)
- Act (10 min)
- Background for the teacher
- Assessment
- Student sheet
US Letter, prints cleanly in black and white. The student sheet is on its own page, ready to photocopy.